Well I guess it has a lot to do with how people perceive Harry..... poster boy or soldier boy.
My guess is, that if he is not allowed to serve, the adverse publicity for the BRF and the British Government would be horrendous. And as for Harry himself....let's not even go there.
I have no doubt that his peers and any of the men he serves with would laugh themselves stupid at the idea of taking along a Royal Protection Squad, they would be as much use a the proverbial t..s on a bull in the battle zone.
Anyway, since when has the British Military publicised the minute detail of any depolyment? A roadside bomb does not discriminate.
Any British Officer will do.
If Harry makes the grade it would be an horrendous waste of talent, and to be honest, the military are not in the habit of wasting their assets. That sort of asset is born, not made.